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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_ | |
6 #define SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/files/file_path.h" | |
11 #include "base/macros.h" | |
12 #include "base/memory/ref_counted.h" | |
13 #include "base/threading/non_thread_safe.h" | |
14 #include "sync/api/attachments/attachment.h" | |
15 #include "sync/api/attachments/attachment_id.h" | |
16 #include "sync/api/attachments/attachment_store.h" | |
17 #include "sync/api/attachments/attachment_store_backend.h" | |
18 #include "sync/base/sync_export.h" | |
19 | |
20 namespace attachment_store_pb { | |
21 class RecordMetadata; | |
22 } // namespace attachment_store_pb | |
23 | |
24 namespace base { | |
25 class SequencedTaskRunner; | |
26 } // namespace base | |
27 | |
28 namespace leveldb { | |
29 class DB; | |
30 } // namespace leveldb | |
31 | |
32 namespace syncer { | |
33 | |
34 // On-disk implementation of AttachmentStore. Stores attachments in leveldb | |
35 // database in |path| directory. | |
36 class SYNC_EXPORT OnDiskAttachmentStore : public AttachmentStoreBackend, | |
37 public base::NonThreadSafe { | |
38 public: | |
39 // Constructs attachment store. | |
40 OnDiskAttachmentStore( | |
41 const scoped_refptr<base::SequencedTaskRunner>& callback_task_runner, | |
42 const base::FilePath& path); | |
43 ~OnDiskAttachmentStore() override; | |
44 | |
45 // AttachmentStoreBackend implementation. | |
46 void Init(const AttachmentStore::InitCallback& callback) override; | |
47 void Read(AttachmentStore::Component component, | |
48 const AttachmentIdList& ids, | |
49 const AttachmentStore::ReadCallback& callback) override; | |
50 void Write(AttachmentStore::Component component, | |
51 const AttachmentList& attachments, | |
52 const AttachmentStore::WriteCallback& callback) override; | |
53 void SetReference(AttachmentStore::Component component, | |
54 const AttachmentIdList& ids) override; | |
55 void DropReference(AttachmentStore::Component component, | |
56 const AttachmentIdList& ids, | |
57 const AttachmentStore::DropCallback& callback) override; | |
58 void ReadMetadataById( | |
59 AttachmentStore::Component component, | |
60 const AttachmentIdList& ids, | |
61 const AttachmentStore::ReadMetadataCallback& callback) override; | |
62 void ReadMetadata( | |
63 AttachmentStore::Component component, | |
64 const AttachmentStore::ReadMetadataCallback& callback) override; | |
65 | |
66 private: | |
67 friend class OnDiskAttachmentStoreSpecificTest; | |
68 | |
69 // Opens leveldb database at |path|, creating it if needed. In the future | |
70 // upgrade code will be invoked from OpenOrCreate as well. If open fails | |
71 // result is UNSPECIFIED_ERROR. | |
72 AttachmentStore::Result OpenOrCreate(const base::FilePath& path); | |
73 // Reads single attachment from store. Returns nullptr in case of errors. | |
74 std::unique_ptr<Attachment> ReadSingleAttachment( | |
75 const AttachmentId& attachment_id, | |
76 AttachmentStore::Component component); | |
77 // Writes single attachment to store. Returns false in case of errors. | |
78 bool WriteSingleAttachment(const Attachment& attachment, | |
79 AttachmentStore::Component component); | |
80 // Reads single attachment_store_pb::RecordMetadata from levelDB into the | |
81 // provided buffer. Returns false in case of an error. | |
82 bool ReadSingleRecordMetadata( | |
83 const AttachmentId& attachment_id, | |
84 attachment_store_pb::RecordMetadata* record_metadata); | |
85 // Writes single attachment_store_pb::RecordMetadata to levelDB. Returns false | |
86 // in case of an error. | |
87 bool WriteSingleRecordMetadata( | |
88 const AttachmentId& attachment_id, | |
89 const attachment_store_pb::RecordMetadata& record_metadata); | |
90 | |
91 static std::string MakeDataKeyFromAttachmentId( | |
92 const AttachmentId& attachment_id); | |
93 static std::string MakeMetadataKeyFromAttachmentId( | |
94 const AttachmentId& attachment_id); | |
95 static AttachmentMetadata MakeAttachmentMetadata( | |
96 const AttachmentId& attachment_id, | |
97 const attachment_store_pb::RecordMetadata& record_metadata); | |
98 | |
99 const base::FilePath path_; | |
100 std::unique_ptr<leveldb::DB> db_; | |
101 | |
102 DISALLOW_COPY_AND_ASSIGN(OnDiskAttachmentStore); | |
103 }; | |
104 | |
105 } // namespace syncer | |
106 | |
107 #endif // SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_ | |
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